diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1c36c8e..c6dd6df 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,6 +19,6 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.java }}
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@cc4fc85e6b35bafd578d5ffbc76a5518407e1af0 # v4.2.1
       - run: ./gradlew assemble
       - run: ./gradlew check
diff --git a/.github/workflows/release-plugin.yml b/.github/workflows/release-plugin.yml
index 9a87836..f055c3c 100644
--- a/.github/workflows/release-plugin.yml
+++ b/.github/workflows/release-plugin.yml
@@ -13,7 +13,7 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: 17
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@cc4fc85e6b35bafd578d5ffbc76a5518407e1af0 # v4.2.1
       - run: ./gradlew publishPlugin
         env:
           GRADLE_PUBLISH_KEY: ${{ secrets.ZAPBOT_GRADLE_PUBLISH_KEY }}